Cold plate
A cold plate includes: a metal base plate having a first surface, a second surface on a side opposite the first surface, and fins disposed in parallel on the first surface; and a topped cylindrical resin cover covering the fins. The first surface has a recessed portion recessed toward the second surface. The topped cylindrical resin cover is heat-fused to the metal base plate on an inner surface of the recessed portion.
1. A cold plate comprising:
a metal base plate having:
a first surface,
a second surface on a side opposite the first surface, and
fins disposed in parallel on the first surface; and
a topped cylindrical resin cover covering the fins, wherein
the first surface has a recessed portion recessed toward the second surface, and
the topped cylindrical resin cover is heat-fused to the metal base plate on an inner surface of the recessed portion.
2. The cold plate according to claim 1 , wherein
the recessed portion comprises a first roughened portion having micropores on the inner surface of the recessed portion, and
the topped cylindrical resin cover is heat-fused to the metal base plate at the first roughened portion.
3. The cold plate according to claim 1 , wherein the metal base plate further has a resin reservoir communicating with a space surrounded by the recessed portion.
4. The cold plate according to claim 3 , wherein the resin reservoir is recessed from a bottom surface of the recessed portion toward the second surface.
5. The cold plate according to claim 3 , wherein
the resin reservoir protrudes outward from the recessed portion when viewed from a direction in which the metal base plate faces the topped cylindrical resin cover, and
the resin reservoir opens to the first surface.
6. The cold plate according to claim 3 , wherein the resin reservoir overlaps the first surface when viewed from a direction in which the metal base plate faces the topped cylindrical resin cover.
7. The cold plate according to claim 1 , wherein
an inner diameter of the recessed portion gradually increases in a direction from a bottom surface of the recessed portion toward the first surface, and
the recessed portion comprises a second roughened portion on a side surface of the recessed portion.
8. The cold plate according to claim 1 , wherein
the topped cylindrical resin cover comprises a flange portion at an opening end portion of the topped cylindrical resin cover,
the flange portion extend s toward an outside of the topped cylindrical resin cover and has a surface that is heat-fused to the metal base plate, and
a dimension of the recessed portion in a direction in which the metal base plate faces the topped cylindrical resin cover is larger than a dimension of the flange portion in the direction.